Index: sys/dev/ic/dwc_eqos.c
===================================================================
RCS file: /cvsroot/src/sys/dev/ic/dwc_eqos.c,v
retrieving revision 1.39
diff -u -p -r1.39 dwc_eqos.c
--- sys/dev/ic/dwc_eqos.c	14 Sep 2024 07:30:41 -0000	1.39
+++ sys/dev/ic/dwc_eqos.c	26 Sep 2024 08:14:07 -0000
@@ -496,7 +496,7 @@ eqos_setup_rxfilter(struct eqos_softc *s
 	hash[0] = hash[1] = ~0U;
 
 	ETHER_LOCK(ec);
-	if (sc->sc_promisc) {
+	if ((sc->sc_if_flags & IFF_PROMISC) != 0)  {
 		ec->ec_flags |= ETHER_F_ALLMULTI;
 		pfil |= GMAC_MAC_PACKET_FILTER_PR |
 			GMAC_MAC_PACKET_FILTER_PCF_ALL;
@@ -614,7 +614,7 @@ eqos_init_locked(struct eqos_softc *sc)
 	eqos_init_rings(sc, 0);
 
 	/* Setup RX filter */
-	sc->sc_promisc = ifp->if_flags & IFF_PROMISC;
+	sc->sc_if_flags = ifp->if_flags;
 	eqos_setup_rxfilter(sc);
 
 	WR4(sc, GMAC_MAC_1US_TIC_COUNTER, (sc->sc_csr_clock / 1000000) - 1);
@@ -701,6 +701,7 @@ eqos_init_locked(struct eqos_softc *sc)
 
 	sc->sc_running = true;
 	ifp->if_flags |= IFF_RUNNING;
+	sc->sc_if_flags |= IFF_RUNNING;
 
 	mii_mediachg(mii);
 	callout_schedule(&sc->sc_stat_ch, hz);
@@ -783,6 +784,7 @@ eqos_stop_locked(struct eqos_softc *sc, 
 	/* Disable interrupts */
 	eqos_disable_intr(sc);
 
+	sc->sc_if_flags &= ~IFF_RUNNING;
 	ifp->if_flags &= ~IFF_RUNNING;
 }
 
@@ -1234,7 +1236,6 @@ eqos_ioctl(struct ifnet *ifp, u_long cmd
 			error = (*ifp->if_init)(ifp);
 		else if (cmd == SIOCADDMULTI || cmd == SIOCDELMULTI) {
 			EQOS_LOCK(sc);
-			sc->sc_promisc = ifp->if_flags & IFF_PROMISC;
 			if (sc->sc_running)
 				eqos_setup_rxfilter(sc);
 			EQOS_UNLOCK(sc);
@@ -1246,6 +1247,31 @@ eqos_ioctl(struct ifnet *ifp, u_long cmd
 	return error;
 }
 
+static int
+eqos_ifflags_cb(struct ethercom *ec)
+{
+	struct ifnet * const ifp = &ec->ec_if;
+	struct eqos_softc * const sc = ifp->if_softc;
+	int ret = 0;
+
+	KASSERT(IFNET_LOCKED(ifp));
+	EQOS_LOCK(sc);
+
+	u_short change = ifp->if_flags ^ sc->sc_if_flags;
+	sc->sc_if_flags = ifp->if_flags;
+
+	if ((change & ~(IFF_CANTCHANGE | IFF_DEBUG)) != 0) {
+		ret = ENETRESET;
+	} else if ((change & (IFF_PROMISC | IFF_ALLMULTI)) != 0) {
+		if (sc->sc_running)
+			eqos_setup_rxfilter(sc);
+	}
+	EQOS_UNLOCK(sc);
+
+	return ret;
+}
+
+
 static void
 eqos_get_eaddr(struct eqos_softc *sc, uint8_t *eaddr)
 {
@@ -1629,6 +1655,7 @@ eqos_attach(struct eqos_softc *sc)
 
 	/* Attach ethernet interface */
 	ether_ifattach(ifp, eaddr);
+	ether_set_ifflags_cb(&sc->sc_ec, eqos_ifflags_cb);
 
 	eqos_init_sysctls(sc);
 
Index: sys/dev/ic/dwc_eqos_var.h
===================================================================
RCS file: /cvsroot/src/sys/dev/ic/dwc_eqos_var.h,v
retrieving revision 1.10
diff -u -p -r1.10 dwc_eqos_var.h
--- sys/dev/ic/dwc_eqos_var.h	15 Sep 2024 07:33:33 -0000	1.10
+++ sys/dev/ic/dwc_eqos_var.h	26 Sep 2024 08:14:07 -0000
@@ -70,9 +70,9 @@ struct eqos_softc {
 	callout_t		sc_stat_ch;
 	kmutex_t		sc_lock;
 	kmutex_t		sc_txlock;
+	bool			sc_if_flags;
 	bool			sc_running;
 	bool			sc_txrunning;
-	bool			sc_promisc;
 
 	struct eqos_ring	sc_tx;
 	struct eqos_ring	sc_rx;